OS Startup Code

Register itself for all free interrupts.
Grab all memory from $\sigma_0$ (without interfering with other initial tasks).
Set up data structures for memory management:
- reserved space for own tables,
- free lists/frame table/page tables for client memory.
Grab all (inactive) tasks.
Start device drivers (may be started as separate initial server tasks).
- Drivers map device pages.
Start other server threads (if multi-server implementation).
Set up data structures for services (TCBs, file system, ...)
Set up task management.
Start up initial ``user'' task(s).
Possibly donate tasks to subtasks.

Gernot Heiser 2002-08-07